Bug#836246: libgtk-3-0: Upgrade from 3.20.9 to 3.21.5 broke Mate desktop

[Cesare Leonardi]

On 01/09/2016 09:01, D. B. wrote:
> Why did you log this against 3.20.9 if that one is fine?

I reply only to the constructive part of your message.
The machines with the problematic gtk are in places not reachable from 
me at the moment so i used reportbug from a working machine, very 
similar to the other and updated apart for few packages, like gtk, which 
i've put on hold.
Since the gtk upgrade broke a large part of a desktop environment, i 
believed to be useful to report that ASAP, with the workaround i had 
found to return to a working state. I took me time to find that was gtk 
the cause of all that.

Initially i was not sure to which package file this bug to: some Mate 
component (which?) or libgtk? But since was libgtk to broke a broad 
spectrum of packages, i had found it more appropriate.

I CC the Mate team to let them know about this problem.
Googling for "mate desktop gtk 3.21" report that upstream had various 
problem and some of them, as far i understand, looks solved.
For example, the problem i had with desktop redrawing seems described here:
https://github.com/mate-desktop/caja/issues/575

Cesare.